L5952 データシートの表示（PDF） - STMicroelectronics

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L5952

MULTIPLE MULTIFUNCTION VOLTAGE REGULATOR

STMicroelectronics 

L5952

EXAMPLES

< Example 1 - no autoincrement mode - >

power on Vin = ON All output OFF (at RESET = “L”)

release reset RESET = “H”. Send sequence:

start I2C

Initial Set

stop I2C

1000 1000 Chip address

0000 0001 OUT3 subaddress

0000 0010 OUT3 data (8.3V, OFF)

0000 0010 OUT4 subaddress

0000 0010 OUT4 data (7.0V, OFF)

0000 0011 OUT5 subaddress

0000 0000 OUT5 data (3.3V, OFF)

start I2C

Set Turn-On

stop I2C

1000 1000 Chip address

0000 0000 OUT2 subaddress

0000 0001 OUT2 data (ON)

0000 0001 OUT3 subaddress

0000 0011 OUT3 data (8.3V, ON)

0000 0010 OUT4 subaddress

0000 0011 OUT4 data (7.0V, ON)

0000 0011 OUT5 subaddress

0000 0001 OUT5 data (3.3V, ON)

0000 0100 OUT6 subaddress

0000 0001 OUT6 data (ON)

< Example 2A - autoincrement mode - >

power on Vin = ON All output OFF (at RESET = “L”)

release reset RESET = “H”

start I2C

initial set

stop I2C

start I2C

1000 1000 Chip address

0001 0001 OUT3 subaddress, autoincrement ON

0000 0010 OUT3 data (8.3V, OFF)

0000 0010 OUT4 data (7.0V, OFF)

0000 0000 OUT5 data (3.3V, OFF)

set turn-on

stop I2C

1000 1000 Chip address

0001 0000 OUT2 subaddress, autoincrement ON

0000 0001 OUT2 data (ON)

0000 0011 OUT3 data (8.3V, ON)

0000 0011 OUT4 data (7.0V, ON)

0000 0001 OUT5 data (3.3V, ON)

0000 0001 OUT6 data (ON)

Before turning on (set turn on procedure), the output voltage should be fixed, as it is done in the initial set pro-

cedure. Do not change the bits of “turn on” and “output voltage” at the same time, otherwise the correct output

12/15

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